Can someone help me on how to save a backdoor URL and how to change my virtual machine IP . My IP appears to be 10.0.2.15

Can someone help me on how to save a backdoor URL and how to change my virtual machine IP . My IP appears to be 10.0.2.15

The question is too vague. You need to specify what are you trying to do? Which course and video are you following? What backdoor URL? Why do you want to change your virtual machine IP?